The code yoy_graph.do:
	1 uses dataset aggregatePlusCategories.dta
	2 produces recession.dta, which stores NBER recession data. To download those data directly from Stata, you need an API key from the FRED website: https://fred.stlouisfed.org/docs/api/api_key.html
and produces figures:
	3 yoy_aggregate_sa_final.pdf
	4 yoy_aggregate_sa_final.png

The version of Stata used to produce these figures is Stata17.
